cross multiplication
Diagonal fraction method
Cross multiplication is a method for solving equations with fractions by multiplying each numerator by the opposite denominator.
If a/b = c/d, you multiply a × d and b × c, then set them equal: Cross multiply to get 3x = 24, so x = 8.
The technique works because you're multiplying both sides by both denominators simultaneously.
- fractionPart divided by whole
- common denominatorNumber dividing all terms
- algebraMath using symbols
- denominatorFraction's bottom number
- reciprocalShared between two parties
proportion · numerator · equivalent fractions · solve · ratio · invert · equation · inequalities · product · improper fractions · factorization · percentage · mixed numbers · systems of equations · trial and error · scaling · distribution · transversal
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